A novel bilayer system comprising LDH conversion layer and sol-gel coating for active corrosion protection of AA2024

被引：87

作者：

Yasakau, K. A. ^{[1
]}

Kuznetsova, A. ^{[1
]}

Kallip, S. ^{[1
,2
]}

Starykevich, M. ^{[1
]}

Tedim, J. ^{[1
]}

Ferreira, M. G. S. ^{[1
]}

Zheludkevich, M. L. ^{[1
,3
]}

机构：

[1] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Mat & Ceram Engn, P-3810193 Aveiro, Portugal

[2] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia

[3] Inst Mat Res Helmholtz Zentrum Geesthacht, MagIC Magnesium Innovat Ctr, Max Planck Str 1, D-21502 Geesthacht, Germany

来源：

CORROSION SCIENCE | 2018年 / 143卷

基金：

欧盟地平线“2020”;

关键词：

Active corrosion protection; Layered double hydroxides; Sol-gel coatings; Vanadate inhibitor; Self-healing; ALUMINUM-ALLOY; 2024-T3; PURE ALUMINUM; ANODIC-DISSOLUTION; ANION-EXCHANGE; INHIBITION; CHROMATE; FILMS; PERFORMANCE; VANADATE; CERIUM;

D O I：

10.1016/j.corsci.2018.08.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work active corrosion protection of AA2024 by a bilayer system consisting of a LDH (layered double hydroxides) conversion layer coated by a sol-gel film was studied. Impedance and Scanning vibrating electrode technique (SVET) studies demonstrated an efficient active corrosion protection and self-healing abilities of the systems containing LDH layer loaded with vanadate corrosion inhibitor. Microstructural and chemical analysis of the surface after corrosion testing showed accumulation of chlorine signal in LDH coatings. The scavenging of chlorides and release of vanadate inhibitor from LDH can explain high efficiency of corrosion inhibition of AA2024 by the novel protective system.

引用

页码：299 / 313

页数：15

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